In preventing against bacteria growth, most sheet masks contain chemical preservatives such as parabens and recently phenoxyethanol, which can be very harmful to the skin. However, many of the products we offer are formulated without Parabens, Sulfates, Phthalates, Synthetic Pigments, Phenoxyethanol, Mineral Oil, Benzophenone-3, Animal-Derived Ingredients, Propylene Glycol, Ethanol, Talc, Benzoic Acid or artificial fragrance.